Machine-gun.



A. A. K. HEINEMANN.

MACHINE GUN.

APPLICATION FILED 1116.1, 1913.

1,128,310. Patented Feb. 16, 1915. a

8 SHEETS-SHEET 1.

1H5 NORRIS PETFRs (to PHOTO-LITHOH LVASHINGI'ON u L A. A. K. HEINEMANN.

MACHINE GUN.

APPLICATION FILED AUG. 7, 1913.

1,128,310. Patented Feb.16, 1915.

a SHEETS-SHEET a.

WITNESSES: M I LWTUI? THE NORRIS PETERS C0,, FHDTO-LITHO, WASHINGI'GN,n. c

A. A. K. HEINEMANN.

MACHINE GUN.

APPLICATION FILED AUG. 7, 1913.

Patented Feb. 16, 1915.

8 SHEETS-SHEET 4.

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A. A. K. HEINEMANN.

MACHINE GUN.

APPLIGATION FILED AUG. 7, 1913 Patented Feb. 16, 1915.

8 SHE W/T/VESSES.

THE NORRIS PETERS Co. PHOTO-LITHO WASHING mN. D.

A. A. K. HEI N EMANN.

MACHINE GUN. APPLIGATION FILED AUG. 7, 1913.

1,128,310. Patented Feb. 16, 1915.

B SHEETSSHEET 6.

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W/T/VESSES. I/VVE/VTUP 144M W I 7477067/[75 THE NORRIS PETFRS caPHOTO-LITHO.. wAsHlNcrON. 0 L! A. A. K. HEINEMANN.-

MACHINE GUN.

APPLIGATION FILED AUG. 7, 1913.

1,128,310. Patented Feb. 16, 1915.

8 SHEETSr-SHEET 7 g waamm m/Q #mww i 6') W W 1 ArmH/vt'ys HE NORRISPETERS C0,,PHo1o-LATHa, ASH NGI'UN, u 1:,

A. A. K. HEINEMANN.

MACHINE GUN. APPLICATION FILED AUG. 7, 1913.

Patented Feb. 16, 1915. L

8 SHEETS-SHEET 8.

THE NORRIS PETERS 60.. PHOTO LITHO.. WASH/HG roN D. c.

dispersion of the projectiles.

UNITED STATES PATENT OFFICE.

AUGUST ALBERT KARL HEINEMANN, OF BERLIN, GERMANY, ASSIGNOR 'III'ODEUTSCCHE WAFFEN- UNI) MUNITIONSFABRIKEN, OF BERLIN, GERMANY.

MACHINE-GUN.-

Application filed August 7, 1913.

T all whom it may concern Be it known that I, AUGUST ALBERT KARLHEINEMANN, a citizen of the German Empire, residing at Berlin, in theGerman Empire, have invented certain new and useful Improvements inMachine-Guns, of which the following is a specification.

The present invention relates to improvements' in machine guns, moreparticularly in hand machine guns; the improvements refer first, to thearrangement and attachment of the stock; second, to the breech block'mechanism; third, to the cartridge feeding mechanism; fourth, to thecover or lid of the receiver of the gun; and fifth, to a muzzleattachment.

The objects of the improvement are first, to provide a stock the endface of which is located in the direction of the axis of the bore of thebarrel, so that the recoil pressure will act in a central direction uponthe shoulder of the gunner, whereby the steadiness of the gun will beincreased during firing; second, to provide a breech block mechanismwhich is exceedingly simple in construction, of a small weight andefiicient in use; third, to provide a cartridge feeding mechanismwherein the length of the stroke of the belt-slide is terminated andmade independent of the varying lengths of the recoils of the barrel, sothat the feeding stroke of the belt-slide will be in all cases the same;fourth, to provide a cover for the receiver which affords facilities inetting access to the interior thereof; and fifth, to provide a muzzleattachment which is adapted, during firing, to be acted upon in downwarddirection by the propelling gases leaving the muzzle' in order to steadythe latter thereby preventing or counteracting the bucking of themuzzle, that is to say, its tendency to jump upward after a shot anddiminishing the I attain these objects by the means illustrated in theaccompanying sheets of drawings.

\ It is evident that various of the details of construction may beemployed in whole or in part, in guns of other types, than that abovereferred to, and in combination with other mechanism well-known in theart.

In order that my invention may be more fully understood I shall nowproceed to describe the same in detail, and for that-pur pose shallrefer to the accompanying drawings, in which similar characters of referSpecification of Letters Iatent.

: the stock.

Patented Feb. 16, 1915.

Serial No. 783,471.

ence indicate like parts in all the figures,

part, Fig. 1 a like view of the front part,

F1g. 2 a longitudinal section of the rear part, and Fig. 2 alongitudinal section of the front part of a hand machine-gun accordingto and embodying the invention; in these figures the lock is in theclosed position and the firing pin is uncooked; Fig. 2 is a sectiontaken on the line I-II in Fig. 2 as seen in the direction ofthe arrow;Fig. 3 is an enlarged side elevation of the lock with the cockedfiring-pin in the closed position before the firing of a shot, otherparts of the gun being shown in section, and Fig. 4 is a like viewthereof in the open position after the firing of a shot; Fig. 5 is a topplan view of the lock in the position disclosed by Fig. 3, and Figs. 6and 7 are end elevations of the lock in the two positions shown in Figs.3 and 4 respectively; Fig. 8 is a side elevation, Fig. 9 a top plan viewand Fig. v10 arear elevation, showing the cartridge feeding mechanismwith the cartridge belt-slide in its inner position, the last View beingpartly in section taken on the line IIIIV in Fig. 12; Fig. 11 is a topplan view showing the cartridge-belt slide in its outer position and thesliding barrel in its extreme rear or recoiled position, Fig. 12 is aside elevation showing the belt-locking device, and Fig. 13 is a topplan view showing the two belt-levers in detail; Fig. 14 is alongitudinal section through the top of the receiver of the machine-gunshowing the sliding lid, Fig. 15 is a top plan view thereof, and Fig. 16is a section taken on the line V-VI in Fig. 14. Figs. 3 to 16 inclusiveare drawn on a larger scale than Figs. 1-2".

Referring to the drawings, the framework or receiver C constituted bythe walls 0, 0, 0, a has a rear tubular projection which may contain thecoil spring m. The stock j has a longitudinal perforation 21 and isplaced on the said projection 20 and firmly held in position thereon andagainst the rear plate C of the receiver C by means of a sleeve-likescrew 22' which is inserted from the rear into the perforation 21 andscrewed into the end of the projection 20. This tubular screw '22 has atits'rear end a flange23 let into a recess in the butt end of This:rec'ess iscovered'by the customary butt-plate 24. The stock is soconstructed and formed that when connected "to the receiver "of the gun,the end face of V the butt is located in the direction of the axis ofthe bore of the barrel. The recoil pressure of the gun will, therefore,act in a central direction upon the shoulder of the gunner. Ifpreferred, the screw 22 may have an internal thread which will engagewith an external thread of the projection 20. In order to prevent thestock 7' turning about the projection 20 the rear plate C of thereceiver C is provided with one or more dowels '25 which enter intoholes in an end plate26 mounted on the front face of the stock.

In the new hand machine-gun the trigger mechanism is actuated by meansof a trigg'er 27 protected by a guard 27. In order that the hand mayhave a suitable support or rest when pulling the trigger, a separatehandle or grip 28 is mounted on the stock 1', so that when shooting thehand does not grasp the neck or thin end of the stock, as is usual withm'uskets, but the grip 28.

The lock (Figs. 2 to 7 .of the machineg'u-n, comprising a box-likecasing a, is suitably mounted to slide between the walls 6 in thereceiver C and is pivotally connected at d in known manner by means of aforked arm c with the foot I. This member 7 is pivotally connected bymeans of the pivot g to the arm it fast on the crank-shaft i whichcarries on its right-hand end projecting out of the receiver C the crankhandle 70, On the shaft 1' is also mounted the cam 11; which influencesthe said spring m. The arrangement of these parts is such that foropening the breech or for moving the lock backward, the hand lever mustbe rocked back from the front toward the rear and that, when the lockmoves backward or opens the togglejoint constituted by the arm 72. andthe member f together with the forked arm 6 is tilted upward, as will beunderstood from Fig. 4.

Mounted in thecasing a of the lock is the firing-pin 37, under theinfluence of the spring 0', and its lever g,as well as the two armed,forked trigger-lever 1' whose rear arm, influenced by a spring 8, passesin front of the retracted firing-pin and holds it cocked until the lever1' 1s rocked by the stop or shoulder -t' of the trigger-rod u andreleased. This lever g" is rocked and the firing-pin cocked in'knownmanner by the upward movement of the forked arm 6', against which thelong arm of the lever g bears.

In the front end of the casing a of the lock is inserted a verticallyslidable, U- shaped" cartridge ejector n which bears at against aresilient abutment w and i i'ifmnt against the book an of a two-armedlever '03" ivotally connected to the lock cas 'ing a. 'e free end ofthis lever a is an cam way ying'such manner that the front end of thelever in rocks downward when the lock slides backward and upward whenthe lock slides forward. Mounted on the side of the casing of the lockat the height of the cartridge-bed 2 of the cartridge feeding casing 3(Figs. 2% and 8-10) is a claw 2 which, when the lock closes, snaps overthe edgeof the end of the cartridge located in the cartridge feedingcasing and, when the lock opens, withdraws from the casing 3 and thecartridgebelt 4 respectively the cartridge clamped between the claw zand the ejector o. For withdrawing the case of the discharged cartridgefrom the barrel 5, which is mounted to slide in lmown manner in atubular water-jacket 6, the cartridge-guide 8 in cooperation with one ortwo spring claws 7 is used; this cartridge-guide 8 is provided on thefront of the lock casing a and extends 5 downward from the claw a to thespring or yielding claws 7 supporting the said empty cartridge-case andholding it at the proper lever. If desired, two such guides 8 may beprovided one at each side of the lock, so that the cartridge is reliablyguided and the cartridge-case positively extracted from the barrel attwo opposite points. An outlet 0 for empty cartridge-cases is providedin the bottomof the receiver C.

Supposing the cartridge-belt 4 has been drawn through the casing 3, acartridge is located in the bed of the latter and the lock, movedforward into its normal or closing position, has seized by means of theclaw z the edge of the cartridge which is located in the casing, whichcartridge abuts against the resiliently mounted ejector 4). (Fig. 2). Ifthe crank handle is is now turned as far as possible to the rear, thelock is moved 1'05 backward pulling at the same time the cartridge outof the belt and thecasing 3. When the lock slides backward the front endof the lever 00 is rocked downward at first slowly and then more rapidlyby the guide y, and the hook m pushes the seized cartridge down betweenthe ejector v at the one side and the claw 2 and guide or guides 8 atthe other side until the cartridge is at the same level as the bore ofthe barrel, in whichposition the cartridge is stopped and secured by thesupporting claws 7 (Figs. 4 and 7). When the cartridge is being pusheddown the bottom end of the cartridge holds the spring supported ejector'0 (Figs. 6, 7) in horizontal direction so far back in the casing of thelock that the recess Q2 of the ejector is out of the path of the pin wof the hook al and consequently when the hook m moves downward this pincannot engage in the "recess 4'). When the lock moves forward again,(Fig. 4), it pushes the cartridge held by it into the barrel in knownmannerand pushes the barrel forward into the shooting position; no

During the forward motion of the lock the hook 012 of the lever a: rocksback into its upper end position. When the lock reaches its closingposition, the claw z seizes the end of the new cartridge in the feedcasing, and this cartridge simultaneously holds the ejector in its rearposition. A cartridge is then located in the barrel, the cartridge inthe feed casing is grasped by the lock and the firing-pin is cocked(Fig. 3). The machine-gun is thus loaded and ready for being fired andcan be employed inknown manner for firing single shots or a number insuccession. After firing a shot the rearwardly sliding lock withdrawsthe new cartridge out of the casing 3, and when separating from thelikewise recoiling barrel also the empty cartridge-case out of thebarrel as pointed out above. The hook m which rocks downward againpushes this new cartridge downward level with the barrel, whereby theempty cartridge case underneath and in the path of the downward movingnew cartridge is forced downward between the supporting spring claws 7,and after having passed the latter is ejected through the opening 0 inthe bottom 0 of the receiver C. When all the cartridge supply ceases thelock sliding rearwardly after the last shot does not draw a newcartridge out of the casing, but only draws the last emptycartridge-case out of the barrel. The ejector 'v owing to the non-supplyof a new cartridge is then no longer held back in the casing of thelock, but is by the action of its resilient support in its outer orforward position of rest, so that the downward rocking hook w engageswith its pin m in the recess '0 of the ejector 'v in order to jerk thelatter downward. The lower ends of the fork-shaped ejector 'v arestriking thereby against the empty cartridge-case supported by thespring claws 7 and throwit downward between the latter and through theoutlet 0 When the lock then again slides forward the hook m of the levera: rocking upward again, lifts the ejector o and returns it into itsupper end position.

The casing a of the lock, guided by the guides 11 in the customarymanner, is provided above with a box a (Figs. 2 to 5) which is open atthe top. In this box is journaled a guide roller a which runs along thetop 0 of the receiver 0 when the lock slides forward and backward. Inthis manner the lock is positively and reliably guided with very littlefriction.

The cartridge feeding mechanism arranged in front of the lock (Figs. 2and 8 to 11) above the sliding barrel -5 and the rear end of thewater-jacket 6 consists of a fiat casing 3 having a transverse aperturethrough which the cartridge-belt 4. passes. 'As seen from the. rear, theright-hand portion of this transverse aperture has the form of acartridge bed 2 for receiving the new cartridge supplied whenever thebelt is fed forward in the direction of the arrow shown in Figs. 9-11.The left-hand portion 1 of the aperture is only so large that the beltemptied of cartridges can conveniently pass through it. The belt-slideor pusher 9 is located in the casing 3 above the said transverseaperture and is shifted when the barrel slides. For this purpose avertical crank-shaft.11 (Figs. 811) is mounted in the casing 3, and apin 10 of its lower crank-arm 10 engages in a slide 10 displaceable inthe transverse recess 5 in the barrel, while a pin 12 of its uppercrankarm 12 engages in an annular slot or groove 9 ,9 in the belt-slide9. The part 9 of the slot which efi'ects the displacement of thebelt-slide is parallel to the axis of the barrel, while thenon-effective part 9 of the said slot runs parallel to the circledescribed by the crank pin 12 This slide 9 is provided at its right-handend with a springlet is provided in the right-hand wall o of thereceiver C and is roofed over by a roof 0 (Figs. 1 10, 12, 13) islocated in the right-hand wall o of the receiver a pivot 16, about whichtwo bell-crank belt-levers 14 and 15 are rockable. The ends of thedownwardly-directed arms of these two levers are formed as grips, whilethe ends of the horizontal arms are provided with upwardlydirected lugsor projections 14: and 15, respectively. A spring 17 inserted betweenthe levers tends to hold the lower arms spread apart. In this positionof the levers the lugs 14: and 15 are in their upper locking positionand project into the space between two cartridges, e. g. between thecartridges p and 79 (Fig. 10); as seen from the rear the one lug islocated in front of and the other in the rear of the cartridgebelt 4:.In this position the belt-leversact as stops for the cartridges.

After firing a shot the look a and the barrel 5 slide at first backwardtogether, whereupon they separate in well-known manner and the barrelcomes to a standstill. By the recoil of the barrel the crank-shaft 11 isrocked by means of the arm 10, whereas the arm 12 pushes the belt-slideoutward. WVhen the pin 12 has passed the length of the effective part 9of the slot the outward movement of the belt-slide 9 ceases. At thistime the parts are in the position shown by dotted lines in Figs. 10 and11. The spring-influenced lever 13 of the slide 9 has passed over andengaged the next cartridge 29 while the lock a which in the meantime hasseparated from the barrel 5 slides farther backward and withdraws thepreceding cartridge p out of the cartridge- 10 and 12), which preventthe cartrid e and the cartridge-belt 4 from shifting to t e right.

At the termination of the outward motion of the belt-slide 9 the recoilof the barrel 5- should also terminate. As the length of the recoil ofthe barrel is not always the same but varies in some limits, so it mayhappen that the recoiling barrel acts too lon upon the belt-crank device10, 11, 12, where 'y the belt-slide 9 would be pushed outward too greata distance, so that'its lever 13 may perhaps engage the secondsubsequent cartridge p (Fig. 10). To prevent such o'ccurrence whichwould bring the whole gun out of function, and to obtain in all events acertain predetermined length of outward movement of the belt-slide inspite of the varying length of the recoil of the barrel the effectiveslot 9 in the belt slide 9 is provided with a non-effective part 9 insuch a manner that during the last part of the rearward rotation of thecrank 10, 11, 12,

and consequently also during the first part of its forward rotation,this crank leaves the belt-slide uninfiuenced, so that when the latterhas reached its required extreme outer position, the barrel can slideback still farther and rotate the crank arms 10, 12 from the positionshown by dotted lines in Fig. 11 into the position shown by full linesin the same figure, without acting on the beltslide. If the barrel ispushed forward by closing the lock the crank 10, 11, 12, will be rotatedin forward direction but it does not act upon the belt-slide as long asthe crank pin 12 is moving in the part 9 [of the slot, but when thecrank pin 12 enters into the effective part 9 of the slot the forwardrotation of the crank device will cause the inward movement of thebelt-slide. During this inward movement the feedlever 13 drives theseized cartridge p and the cartridge-belt with it and brings thecartridge into the cartridge b'ed 2' of the casing 3 in which thecartridge was previously located. The part of the belt emptied ofcartridges slides a corresponding distance through the outlets (Fig.- 10in the left-hand side wall 0 of the receiver C.

If it is desired to withdraw the cartridgebelt to the right, it is onlynecessary to press together the lower arms of the belt-levers 14 and 15against the action of the spring 17 The upper ends or lugs 14, 15 ofthese levers are thereby rocked downward and the lugs 14 and 15 thusremoved out of the path of the cartridges, so that the belt can beunimpededly withdrawn toward the right. The lugs 14, 15' are beveledontheir outer sides, so that the cartridges able grooved guides (Fig.16'). This sliding lid is held in its closed position by a lockingdevice arranged as follows. On the lid 0 is mounted a U-s'hapedmember 29whose elastic limbs are connected togetherby a cross-bar 30. The framethus formed surrounds a bulged portion '0" of the lid. In

the closed position of the lid the bar 30 bears against a bent-up ortion31 of the rear wall of the rec'eiver w ich serves as a stop and limitsthe closing movement of the lid. The free ends of the limbs of themember 29 are, formed as hooks 32, and when the lid is in its "closedposition they engage behind suitable stops 33 provided on the wall 31.The sliding lid is then fixed in both directions of movement.Foropening'the lid 0, by lifting the frame 29, 30 the hooks 32 are firstreleased from the stops 33, whereupon the lid is slid forward in itsguides. For more conveniently gras ing and holding the member 29 theouter 'e] ges of its limbs'are roughened or che'ckeredat 34 (Fig. 1')The sliding lid is closed in the reverse manner.

It is well known that hinged lids which are usually used for closing thereceiver of Inachine'g'uns, have a good many drawbacks, and also slidinglids constructed and arranged to be opened by sliding the lid rear.-ward show the disadvantage that such a'sliding lid inits opened positionwill be obs'tructiv'e, impede the gunner and sag or get out of shape asthe free end of such a sliding lid can not be supported in the requiredmanner. These disadvantages are obviated by forming the cover of thereceiver as a sliding lid which in accordance with the presentimprovement is adapted to be opened by pushing it longitudinally towardthe front. the improved sliding lid in its open position is locatedfairly close over the water jacket, there is always suflicie'ntroom foropening and supporting it in such opened position by suitable means,shoulders or the like attached to the water jacket. Moreover in itsopened lid ferms no 0 struction forv the work of the gunneror to bedonein the receiver. Into the front wall 35 of the water-jacket 6 of thehand machine gun is screwed a sleeve-like structure 36 which surroundsthe muzzle of the barrel 5 and is provided beneath the muzzle {with atroughshaped projection 36. t The sleeve 36 maybe PIOVldGd in its upperpart, if desired with perforations 36 constituting outlets or passagesforthe propelling gases leaving the barrel. Upon the recessed front fendof the sleeve is mounteda371 After sleeve has been screwed ifithpesifiian "in the 'wall 35 this ring is located between this wall and acollar 36 on the sleeve 36. The ring has two lateral or more properlydownward directed eyelets 38, 39 by means of which it may be pivotallyfastened on a three-legged rest or the like as shown by dotted lines in2 or on a suitable arm or support exten ing from a guncarriage notshown.

When firing a shot the driving gases issuing from the bore of the barrelcan freely escape upward, whereas in downward direction they arestriking a ainst the projection 36 forming and acting somewhat like abaffle-plate to cause the said gases to exert a downward pressure uponthe muzzle attachment. Owing to this downward pressure the muzzle of thehand machine gun, when firing a shot, will be prevented from bucking oris held down,' when' supported, on its rest, carriage or the like,whereby the dispersion of projectiles is greatly reduced.

I claim a 1. Ina hand machine-gun, the combination of a receiver havingan outlet in the bottom thereof, a barrel having its breech end mountedin the receiver, a lock slidable longitudinally in the receiver, forclosing the breech, a cartridge-feeder fixed in the receiver above thebreech end of the barrel, said lock having a vertical guide extendingfrom the cartridge-feeder down to the breech,

means on the lock for seizing a cartridge lo cated in thecartridge-feeder, holding the same at the top of said guide,'andwithdrawing the same from the feeder when the lock moves backward, meanson the lock for seizing an empty cartridge-case located in the barrel,holding the same at the bottom of said guide and withdrawing the samefrom the barrel when the lock moves backward, and a two-armed .leverfulcrumed in the lock, the one end of said lever being positively guidedin the receiver, and the other end being adapted to drive downward insaid guide a cartridge withdrawn by said former means and thereby toeject through said outlet the cartridge-case withdrawn by the lattermeans. 1

2. In a hand machine-gun, the combina tion of a receiver having anvoutlet in the bottom thereof, a barrel having its breech end mounted inthe receiver, a lock slidable longitudinally in the receiver for closingthe breech, a cartridge-feeder fixed in the receiver above the breechend of the barrel, said lock having a vertical guide extending from thecartridge-feeder down to the breech, an ejector slidable vertically insaid guide, means on the lock for seizing a. cartridge located in thecartridge-feeder, holding the same at the top of said guide, andwithdrawing the same from the feeder when the lock moves backward, meanson the lock for seizing an empty cartridge-case located in the barrel,holding the same at the bottom of said guide and withdrawing the samefrom the barrel when the lock. moves backward, and a two-armedleverfulcrumed in the lock, the one end of said lever being positively guidedin the receiver, and the other end being adapted to drive said ejectordownward in said guide and thereby to eject through said outlet thecartridge-case withdrawn by the latter means.

3. In a hand machine-gun,the combination of a receiver having an outletin the bottom thereof, a barrel having its breech end mounted in thereceiver, a lock slidable longitudinally in the receiver for closing thebreech, a cartridge-feeder fixed in the receiver above the breech end ofthe barrel, said lock having a vertical guide extending from thecartridge-feeder down to the breech, an ejector having a recess in thefront face thereof slidable vertically in said tridge located in thecartridge-feeder, holding the same at the top of said guide, and

withdrawing thesame from the feeder when the lock moves backward, meanson the lock for seizing an empty cartridge-case located in the barrel,holding the same at the bottom of said guide and withdrawing the samefrom the barrel when the lock moves backward, and a two-armed leverfulcrumed in the lock, the one end of said lever being positively guidedin the receiver, and the other end being hooked and carrying a pinadapted to engage in said recess and drive said ejectordown and up insaid. guide.

'4. In a hand machine-gun, the combination of a receiver having anoutlet in the bottom thereof, a barrel having its breech end mountedinthe receiver, a lock slidable longitudinally in the receiver for closingthe breech, a cartridge-feeder fixed 'inthe receiver above the breechend of the barrel, said lock having a vertical guide extending from thecartridge-feeder down to the breech, a U-shaped ejector slidablevertically in said guide, a spring tending to press the ejectorto thefront of said guide, means on the lock for seizing a cartridge locatedin the cartridge-feeder, holding the same at the top of said guide, andwithdrawingthe same from the feeder when the lock moves backward, meanson the lock for seizing an empty cartridge-case located in the barrel,holding the same at the bottom of said guide and withdrawingthe samefrom the barrel when the lock movesbackward, and a twoarmed leverfulcrumed in the lock, the one end of said lever being positively guidedin the receiver, and the other end being adapted to drive said ejectordownward in said guide.

5. In a hand machine-gun, the combination of a receiver, a barrelattached thereto, a stock attached in alinement with the barrel to therear wall of the receiver, a

lock guided laterally in the receiver, and a guide roller mounted on thetop of the lock and guided by the top of the receiver.

6. In a machine. gun, the combination of a barrel, a cartridge feeder, alock movable toan open and closed position, means on said lock. forwithdrawing a cartridge from the cartridge feeder, means on said lockfor withdrawing a cartridge'case from the barrel, a guide carried bysaid lock, a lever pivotally connected with said lock'and adapted tomove therewith, said lever being arranged to move the withdrawncartridge downwardly in said guide into alinement with the barrel 'andtocause the said cartridge to expel the withdrawn cartridge case, anejector held in an inoperative position by'each succe'eding cartridge,and arranged to move into the path of the pivoted lever after the lastcartridge has been withdrawn from the feeder whereby said lever willactuate said ejector toexpel the final cartridge case and means foroperating said lever.

7. In a machine gun, the combination of a .26 barrel, a cartridgefeeder, a lock movable to an open and closed position, means on saidlock for withdrawing a cartridge from the cartridge feeder, means onsaid lock for withdrawing a cartridge casefrom the bar- Tel, agui'de'carried by said look, a lever pivotally" connected with said lockand adapted tomove therewith, said lever being arranged to move thewithdrawn cartridge downw'ardly in said guide into alinement with the*barrel, a spring controlled bow-shaped ejector adapted to behorizontally moved against the tension of its spring toward the rear toan inoperative position, said spring being" arran ed to move saidejector in a reverse direction into the path of said lever and means foroperating said lever.

8. In a machine gun, the combination of a 7 barrel, acartridgefeeder,:;alock movable to I anopen and closed position, means on said 46lo'ck" for withdrawing a cartridge from the 50 "tomove'therewith, saidlever bein arranged cartridge feeder," means "on said lock forwithdrawing a cartridge case from the barrel, a guide carried by saidlook, a lever pivotally connected with said lock'and adapted to move thewithdrawn cartri ge downwardly in said guide into alinement withthebarrel, an ejector movable "into the pathjof said pivoted leverandprovided with a notch, a pin on said lever adapted to enter said notchwherebysaid ejector-is actuated Copies of this patentmaybrolitaine'd forcover is arrested and col'iperatin said receiver and cover respective yfor lock-- in the exp lling direction euring ens meva m'en't of saidlever, a hook-like projection on said lever adapted to en a e saidejector whereby the latter is actuate in a reverse said lever and meansfor operating said lever. I

.9. In a machine gun, a receiver, an upr ght pro ect on thereon, ashdable cover for said receiver, a resilient member carried directionduring an opposite movement/of by said cover and adapted to engage saidi projection whereby a closing movement of said cover is arrested, andmeansjcarried by said member adapted to engage said receiver for lockingsaid cover in its closed position.

10. In a machine gun, a receiver, a slidable cover therefor, meanscarried by said cover and adapted to engage said receiver for lockingsaid Icoverfin itszclosed position.

and means on said receiver for engaging said locking means wherebya'clo'smg movement of said cover s arrested.

11. In a machine gun, a reeeiver,=amov-" wardly bulged portion, amovable member able cover therefor-provided with anoutsurrounding saidportion and .pro'ections carried by, said member and Y arrange to engagesaid receiver whereby said cover is locked in its closed position.

12. In a mach'ne gun, a receiver, a mo vable cover therefor providedwith an outwardly bulged portion, resilient members on opposite sides ofsaid portion, a cross-bar connecting said members, a projection on saidreceiveradapted to engage said crossbar whereby a closing nmovement ofsaid means on in'gthe latter in its closed "position.

wardly bulged portion, resilient members on opposite sides of saidportion,ga cross-b ar connecting said members, a pro ection on andadapted to be engaged by said hooks whereby said cover position. I v

Witnesses I WOLDEMAR :HENRY HA'srER.

five cents each, by addressing "the "Commissioner :of Patents,Washington, D. O." i I 13. In a machine gun, a receiver, a -mo vablecovertherefor provided with an out- AUGUST ALBERT 1 said receiveradapted toen'gage saidcrossbar whereby a closing movement of said coveris arrested,- a hook carried by each member and stops located onsaid'recei-ver is locked-in its closed

